X-TINE, that cannot be: That you are clueless about his money, & you have lost control over your money.
Habang bata bata ka pa, correct this situation. I don't agree that your issues are mere/small irritants. IMO, your husband is setting you up & what you see now is just the tip of the iceberg. You are, de facto - powerless now. Do not allow that to go on...
Marriage, like all relationships on earth: is a Power Play.
It is fair to both spouses if the Balance of Power is near equal. Otherwise, it is but human for the 1 wielding the bulk of the power to be abusive. "Abusive" as to assume/take for granted that the other sees & enjoys the world as he does. No 2 people are alike, & you have the right & intelligence to crunch the world your own way. Every person needs Self Expression & Self Determination.
It is not right that you are deprived of Self Determination & Self Expression just because you are married.
But, that's just my opinion after all.
Is your hubby the Heir Apparent-in-training? Yes? Good for him, you & your kids.
Your family will be the major beneficiary of everybody's participation -- BUT, your parents-in-law must drop dead first. Sorry, but that's reality.
If your hubby is not the H/A - ay, susko, after your in-laws.. You & hubby will be under the thumbs of the H/A brother & his wife.
& You will always be a mere employee with not much prospect for advance -- until a lot drop dead. Sorry, but that's reality.
I got the impression you had a career/business before settling down; & made good money.
IMO, you should set up a business of your own. That will solve your current lack of Self Determination & Self Expression.
Darling, with your own business -- you provide yourself the Best Insurance you can get for yourself.
And -- you can deal with all in-laws, including out-laws, & MIL -- on your own terms.

You do not know how much he makes? How much money is in his/your joint account?
Prudence dictates 2 names at least on a family account.
Sino co-signatory nya? His mom? If you are not the co-signatory to his accounts: very bad news for you.
If you do not know his accounts: even bigger bad news.
But that all is just my opinion, after all.
I am not predicting that your husband's love for you will dim.
But, well, people do change. Masama ba to have YOUR best interest at heart?
Isn't it YOUR obligation to provide for/protect YOUR future too?
IMO, Hindi tama you default in minding your interest just because you got married & have a husband who provides for all your needs. Sure, that he does, NOW.
But that all, after all, is just my opinion.
I have a BFF who was in the same circumstances as you are in now.
When the father in law died, the mother in law took over & was stingier with the funds.
She said she could no longer breathe in the marriage then. So she started with a snack business, that her MIL scoffed at (kasi shipping business nila) But now, she has a string of businesses in malls. Her hubby is so proud of her.
Another BFF - she knew nothing of hubby's assets & finances.
This 1 has soooo many credit cards, she buys loads of stuff she forgets to use. Her hubby pays for it all, no complaints. IMO, expensive wife on a short leash.
1 day an epiphany hit her -- that foreign investment account manager she would pick up fom the NAIA -- bring around the Phils & who she entertained -- then brought back to the airport -- all per the instructions of her hubby -- well, not only was that woman managing her hubby's foreign wealth, but also managing her hubby's ballz. Lols. Mistress pala, based in Singapore.
When she confronted her hubby, he said: What can you do about that? End of conversation.
Oh, she is nowadays more vindictive -- shopping like -- sumakit ulo ko when she bought a dozen pairs of designer boots in 30min. Kalokers. Abnormal.
IMO, the manager BFF is far happier than this big spender BFF.
So there, people in the lap of luxury, with all their trappings of wealth -- can be unhappy.
Some, like my mom, will say: At least, she is suffering in comfort.
OhMyGag.
Being married doesn't mean you put your brains in the freezer.
It doesn't mean you surrender your need for Self Expression & Self Determination to your spouse.
Moreover,
IMO, madali manipa nang tao if you think that person can't answer your question: What can you do about that?
IMO, napakahirap if -- pagsinipa ka, hindi ka makasipa back.
But that's all just my opinion.
Your Choice.
X-TINE, IMO -- ASAP, make Life Adjustments s o that you will not reach the point you must make
Life-Changing Decisions.
PRAY for Divine Guidance & the Courage to act.